Instructions

ZOOM IN by clicking on the page. A slider will appear, allowing you to adjust your zoom level. Return to the original size by clicking on the page again.

MOVE the page around when zoomed in by dragging it.

ADJUST the zoom using the slider on the top right.

ZOOM OUT by clicking on the zoomed-in page.

SEARCH by entering text in the search field and click on "In This Issue" or "All Issues" to search the current issue or the archive of back issues
respectively.
.

PRINT by clicking on thumbnails to select pages, and then press the
print button.

SHARE this publication and page.

ROTATE PAGE allows you to turn pages 90 degrees clockwise or counterclockwise.Click on the page to return to the original orientation. To zoom in on a rotated page, return the page to its original orientation, zoom in, and
then rotate it again.

CONTENTS displays a table of sections with thumbnails and descriptions.

ALL PAGES displays thumbnails of every page in the issue. Click on
a page to jump.

42 INFRASTRUCTURE AUSTRALIA APRIL 2010
Power
Darwin s electrical supply shored up
An aerial view of the Archer Zone substation near Palmerston, Northern Territory, prior to electrical fitout.
A$26 million substation in
Darwin s growing conurba-
tion of Palmerston is nearing
completion as the Power and
Water Corporation continues to meet the
growing power demands of one of the
Northern Territory s fastest growing areas.
Once complete the new Archer Zone
substation will provide increased capacity
to the Palmerston region which is expect-
ing more than 3700 new residential blocks
to come online in the next ve years.
The civil construction phase at the
substation was completed last October
by Sitzler. Monadelphous Engineering
is currently installing the high voltage
switchyard equipment, protection and
control panels, auxiliary equipment and
associated cabling. Testing is expected to
commence toward the end of July.
The substation will provide for al-
ternative power supply and capacity
to Palmerston at 11kV. e Power and
Water Corporation said this is required
to provide for increased system security
and redundancy, and to service increased
load growth in the area resulting from de-
velopments such as Robertson Barracks,
expansion of the Palmerston Shopping
Centre, numerous new developments in
the Palmerston CBD and extensive resi-
dential subdivisions.
e substation will initially comprise
one x 27MVA transformer and be de-
signed for an ultimate con guration of
three x 27MVA transformers.
Power and Water Corporation project
manager Raj Dasgupta said the new sub-
station is on track to be commissioned
later this year.
A 66kV transmission line will also
connect the new substation to the Hudson
Creek substation. is new transmission
line will help meet the increasing demand
for electricity for the Palmerston and East
Arm Port areas as well as provide a secure
supply route from the new Weddell pow-
erstation to the greater Darwin region.
Weddell powerstation was commis-
sioned last year and operates on two
gas-powered 43MW turbines. Tenders
are soon to go out for the third generator,
to capture and be powered by the heat
generated by the rst two.
Bulk excavation work has
started on a key component
of a vital Sydney project.
The CityGrid project is
EnergyAustralia s $1 billion plan to
meet the Sydney CBD electricity sup-
ply over the next decade. It involves
four new or upgraded zone substations
connected by 6km of underground
tunnels that will carry more than
100km of 132kV transmission cables
to connect the substations.
e excavation of the new Belmore
Park substation site is being undertaken
by Ford Civil Constructions and will
include the construction of a sha and
"stub" tunnel of about 12m which will
connect the new substation into the
existing City South Cable Tunnel. Bulk
excavation is expected to be completed
around June.
Construction of the substation will
start once excavation is complete. e
Energy2U Alliance comprising Leigh-
ton Contractors, AECOM, Pow-
erServe and EnergyAustralia, will
construct the substation building.
Belmore Park substation will feature
ve 50MVA transformers, seven 132kV
feeders and up to 100 11kV cables.
e zone substation is expected to be
completed in 2012.
Other works on the CityGrid proj-
ect will roll out to 2017.
Keeping the city connected